package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exceptions.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.mapper.SystemUserMapper;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private StringRedisTemplate  stringRedisTemplate;
    @Autowired
    private SystemUserMapper systemUserMapper;

    @Override
    public CaptchaVo getCaptcha() {
        //生成验证码
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        //设置验证码类型
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);

        String code = specCaptcha.text().toLowerCase();
        //加上uuid
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID().toString().replaceAll("_","");
        //生成图片，不乱码
        String image = specCaptcha.toBase64();
        //存储
        stringRedisTemplate.opsForValue().set(key, code, RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);

        return new CaptchaVo(image, key);
    }

    @Override
    public String customLogin(LoginVo loginVo) {
    //1.判断是否输入了验证码
    if (!StringUtils.hasText(loginVo.getCaptchaCode())) {
        throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND.getMessage(),ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND.getCode());
    }

    //2.校验验证码
    String code = stringRedisTemplate.opsForValue().get(loginVo.getCaptchaKey());
    if (code == null) {
        throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED.getMessage(),ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED.getCode());
    }

    if (!code.equalsIgnoreCase(loginVo.getCaptchaCode().toLowerCase())) {
        throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR.getMessage(),ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR.getCode());
    }

    //3.校验用户是否存在
    LambdaQueryWrapper<SystemUser> queryWrapper = new LambdaQueryWrapper<>();
    queryWrapper.eq(SystemUser::getUsername, loginVo.getUsername());
    SystemUser systemUser = systemUserMapper.selectOne(queryWrapper);
    if (systemUser == null) {
        throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR.getMessage(),ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR.getCode());
    }

    //4.校验用户是否被禁
    if (systemUser.getStatus() == BaseStatus.DISABLE) {
        throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR.getMessage(),ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR.getCode());
    }

    //5.校验用户密码
    if (!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))) {
        throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR.getMessage(),ResultCodeEnum.ADMIN_ACCOUNT_ERROR.getCode());
    }

    //6.创建并返回TOKEN
    return JwtUtil.createToken(systemUser.getId(), systemUser.getUsername());
}
}
